Taylor Swift discusses John Mayer, Jake Gyllenhaal on Ellen DeGeneres

Taylor Swift may be trying to play coy about the songs on her latest album, "Speak Now" - and specifically, who they're about - but she's not particularly good at it. On the Oct. 29 episode,
Ellen DeGeneres asks her if "Dear John" is about John Mayer,
or if it's just a "Dear John" letter.